萨中油田聚驱后蒸汽吞吐工艺技术研究

大庆油田萨中开发区主力油层聚驱后,油层含水高,剩余油分布零散,但丰度仍然很高,开采难度大。为探索聚驱后进一步提高采收率的新途径,应用蒸汽吞吐可以改善原油流动性能、提高驱油效率的技术特性,着重进行了聚驱后油井蒸汽吞吐技术的矿场试验,并以北一区断东中块萨中开发区北部的北1-4-P37井进行现场应用与分析,探索出合理的注气参数、注入方式,掌握吞吐后油井的动态变化规律,为进一步取得聚驱后蒸汽吞吐后开采效果提供依据。

Research on Steam Soak Technology After Polymer Flooding in Sazhong Oilfield

After the polymer flooding in the main reservoir of Daqing oilfield,the reservoir water cut is high,the remaining oil distribution is scattered,but the abundance is still very high,and the exploitation is very difficult.In order to explore a new way to further enhance oil recovery after polymer flooding,the steam stimulation is used to improve the flow performance of crude oil and improve the efficiency of oil displacement.In this paper,field test of the steam stimulation in the North 1-4-P37 well of the northern development zone was carried out.The reasonable injection parameters and injection methods were explored,and the dynamic variation law of oil well after the stimulation was mastered.